/**
 * Created with IntelliJ IDEA.
 * Description:
 * User: yinsh
 * Date: 2025-01-23
 * Time: 13:33
 */
public class MyStack {

    StackNode head;//指示栈顶
    public static class StackNode {//每个栈元素
        int val;//值域
        StackNode next;//指针域
    }
}
